TY - JOUR A1 - Luis Delgado, José Dario AU - Tomás Balibrea, Luis Manuel AU - Martínez Cabeza De Vaca Alajarín, Juan de la Cruz T1 - Automatic system for quality-based classification of marble textures Y1 - 2005 SN - 1094-6977 UR - http://hdl.handle.net/10317/1285 AB - In this paper, we present an automatic system and algorithms for the classification of marble slabs into different groups in real time in production line, according to slabs quality. The application of the system is aimed at the marble industry, in order to automate and improve the manual classification process of marble slabs carried out at present. The system consists of a mechatronic prototype, which houses all the required physical components for the acquisition of marble slabs images in suitable light conditions, and computational algorithms, which are used to analyze the color texture of the marble surfaces and classify them into their corresponding group. In order to evaluate the color representation influence on the image analysis, four color spaces have been tested: RGB, XYZ, YIQ, and K-L. After the texture analysis performed with the sum and difference histograms algorithm, a feature extraction process has been implemented with principal component analysis. Finally, a multilayer perceptron neural network trained with the backpropagation algorithm with adaptive learning rate is used to classify the marble slabs in three categories, according to their quality. The results (successful classification rate of 98.9%) show very high performance compared with the traditional (manual) system. KW - Electrónica KW - Superficies de mármol KW - Clasificación de patrones KW - Análisis de componentes principales KW - Suma y diferencia de histogramas KW - Textura análisis KW - Marble surfaces KW - Pattern classification KW - Principal component analysis KW - Sum and difference histograms KW - Texture analysis KW - Artificial neural networks LA - eng PB - IEEE Systems, Man, and Cybernetics Society ER -